<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <p>123</p>
  <script>
    try {
      let age = 10
      debugger
      console.log(age);
      console.log(uname);
    } catch (err) {
      alert(err.massage)
    } finally {
      console.log('come on');
    }
    console.log(1 + 1);
  </script>
</body>

</html>